#include <stdio.h>
#include <string.h>

int main(int argc, char const *argv[])
{
    int param = 100;
    int *p_param = &param;
    int **pp_param = &p_param;

#if 0
    printf("source %d\n", param);
    // 修改值
    *p_param = 200;
    printf("source %d p_param %d\n", param, *p_param);
    **pp_param = 300;
    printf("source %d pp_param %d\n", param, **pp_param);
#endif
    // printf("value=%d\n,p_value=%d\n,pp_value=%d\n", param, *p_param, **pp_param);
    printf("s_point=%p\n, p_point=%p\n,pp_point=%p\n", &param, p_param, *pp_param);
}
